Outlines the parameters and data fields used when creating a new Task

A Task can be assigned to up to 10 firm users, or to one Contact, but never both.

• Send assignees to set the firm-user set. The list replaces the existing assignees rather than adding to them. The response order may differ from the order submitted.
• Send assignee (with both id and type) to assign a single User or Contact. Sending it to a Task that currently has several assignees collapses the set down to that one assignee.
• The two are mutually exclusive: sending both is rejected, and so is an empty assignees list.
• Reading back: assignees lists the firm users the Task is assigned to, and assignee is one of them. assignees is [] in every other case, including a Contact assignee. An unassigned Task returns assignee as null and assignees as [].